Sand-slinging apparatus



May 5, 1931.

w. H. wANGl-:LIN-

SAND SLINGING APPARATUS Filed Jan. 4. 1930 Patented `May 5, 1931 waarna Wanssum. or sr. Louis, nissovni,

i Asanisuivante`.er,rii15n'-rtrs.

Application"nledjanuary 4, 1930. Serial No. 418,515.

This invention relates generally to molding apparatus and more specifically to an 1mproved apparatusV adapted for use` 1n .intro- 'ducing sand into molding flasks-,the predominant object of the invention being to provide an apparatus of this type which includes as a partthereof a swingable sand slinger which is so supported that samemoves in a true horlzontal plane during movement thereof. p

Prior to this invention apparatus ofthe general type of thatfdisclosed herein have been producedbut in allfof such apparatus with which I am familiar the `swingable sand manner that said'sand slingers Vmoved in an arcuate path. This wasv a' decided disadr vantage inasmuch as it causedfthe streams of sand issuing from the sand slingers to be directed at an angle tothe ltrue perpendicular l when the -sand slingers were moved'from their -normal perpendicular positions.

f In the use of apparatusof the type disclosed herein a large flask or a number of smaller flaslis'are arranged on themolding oor'at `the base of the apparatus and beneath the f swingable frame which supports the sand slinger` and sand issuing Afrom rthe sand slingeris directed into all parts of the large fiask or successively into the various smaller flasks. In the use of apparatus Iheretofore employed having the pivotally supported sand slingers referred to' above,A the sand wouldbe directedifnto thejsm'aller flasks located immediately-beneath said "sand slingers,` or into-the portion so positioned of alarger fia-sk, inthe desiredmanner, that is to the stream of sand wouldbe'direeted perpendicularly into said fiaSlS; `IlIowever,

`when other flasks orV otherportons of a larger flask were located in horizontalyoffset relation with respect to the sand' slingers it was necessary th at said sand slingers be swung on their pivots so thaty the stream of sand dis-V charged therefrom may be directed intosaid offset flasks or flask portions and where this was done the sand stream was directed at an angle with the consequent loss of precision in directing the sand into the flasks.

\ In the use `of my improved @Pparatus the lsand slinger thereof is'swingably vsupported -or throw ofthe sand slinger. Y Another important featureof the present invention resides in the fact thatlthe sand Y slinger is capable of vuniversal horizontal movement, hence any flask located-inV theiio area-*covered by the swingor-throwofuthe sand slinger or any1 portion of a mold so lo-` cated may receive sandfrom saidsand slinger. slingers were pivoted toa support in such Y 15 YFigure 1 isa view of my improved appaand partly in elevation. Y

Y Figure 2 is a plan view ofthe apparatus illustrated inrFigure 1; v

Figure 3v is a section of the sand slinger ofw my improved apparatus including afragfilo ment ofthe sand conductor leading thereto.

Figure 4 is a fragmentary detail 'illustrating a modification of preferred form of the invention.

In the drawing, wherein is shown for pur- "i5 poses of illustration, merely, several embodiments of the invention, A designates the irn- A proved apparatusy which includesv a; base plate 1 adapted for attachment by suitable. means to a suitable support 2. The base plate '80 v lis provided withan upstanding portion 3 which is provided in its top face with a ball i racewa-y 4. 5 designates -a'b'asecap provided preferably .with a l downwardly extended :crf cumferential flange 6 which `embraces the 11p-"e5 K standing portion 3 ofthe base plate 1 and I6 designates a hall racewayformed in the lower face of thel top wall-of said nhase o'apL The racewaysi and arealined vertically with y, respect to each other' and 7 designates'anti- 90 friction balls which are arranged in said race- Ways and thus provide for'free rotary Inovevment of the base cap with respect tof-the baseV plate. The base cap 5 Vis provided with an outstanding lug 8 through which a bolt 9is 95 extended and the base plate `1' is provided with a plurality of screw-threadedl apertures 10 into which the lower screwthreaded end portion ofthe bolt 9 may be screwed for theV purpose of .preventing .undesired 'rotary 100 I' tion gearing 29. i

movement of the base cap 5 with respect to the base plate 1.

Fixed to the base cap 5 and extended up wardly therefrom is a pair of supporting elements 11 providing a standard, said supporting elements preferably, though not neces sarily, being in the form of channel beams arranged back to back and in spaced relation as illustrated more clearly by dotted lines in Figure 2. Secured to the upper ends of the supporting elements 11 by suitable fasten` ing devices 11 is a horizontally disposed supportin member 12 which may, if desired, be in the orm of a channel beam arranged with its back wall at the bottom and its spaced side flanges extended upwardly. The spaced side flanges of thesupporting member 12 'provide a seat for a cylindrical housing .13,'whicli' at one of its ends is provided with an enlarged portion 14,l and at its opposite end is provided with a downturned hollow portion 15. The interior of the enlarged portion 14 and the passageway through the hollow portion lrcommunicate with the interior of 'the cylindrical housing 13, vand arranged within said cylindrical housing is a screw conveyor'l, said screw conveyor being supported for ro tation in suitable bearings 17, Yand rotary motion being imparted thereto by means of suitable motion producing means such, for instance, as an electric motor 18; The shaft of the screw conveyor and the drive shaft of the motor 18 are provided with suitably sized sprocket wheels over which a sprocket chain l 19 operates whereby motion is transmitted from the motor to the screw conveyor.

Arranged in a vertical position adjacent to the supporting 'elements 11 is a conveyor housing 20, and arranged for operation within said conveyor housing is an endless conveyor 21. The endless conveyor 21 is of conventional design, comprisingV a sprocket chain 22 arranged for operation over sprocket wheels 23 arranged in the upper and lower portions of the conveyor housing.; rlhe sprocket chain 22 has buckets 24 iixed thereto in the manner common to conveyors of' this type. At the lower end of the conveyor housing 2O same is provided with a hopperportion 25, and at its upper end 'said housing is provided with a horizontally disposed portion 20 which overhangs the enlarged portion 14 `the cylindrical housing 13.

` frame.

30 designates a suitable rectangular frame which supports at one of its ends the sand slinger 31 of my improved apparatus, said sand slinger being of the usual type employed for throwing sand in foundries, com prising a suitably shaped barrel 32 within which a revolving sweep 33 is arranged, said sweep being rotated at a high rate of speed by the electric motor 33. The barrel of the sand slinger is provided with a discharge passageway 34 which is extended downwardly, and .at its upper end said barrel is provided with an inlet conduit 35 which is shaped at its upper end to provide a socket 36. 37 designates a hollow sand conductor which leads v.from the cylindrical housing 13 to the barrel 32 of the sand slinger. The sand conductor 37 at its lower end is provided with a globular portion 38 which is seated in the socket 36 at the upper end of the conduit 35 leading to the barrel of the sand slinger 32. Likewise at the upper end of the sand conductor 37 same is provided with a socket 39 in which is seated a globular portion 40 formed at the lower end of the portion 15 of It is obvious that the associated socket 36 and globular portion 38 provide a universally movable joint which is located at the lower end of the sand conductor 37, and that the socket 39 and globular portion 40 provide a second universally movablejoint which is located at the upper end of said sand conductor 37.

41 designates a plurality of suspension ele l ments which support the frame 30 and with it the sand slinger 31 which is supported by said In the embodiment of the invention illustrated in Figures 1 and 2 there are four ofvfthese suspension elements, though more or less of said elements may be employed if desired, and each suspension element is connected at its upper end to the member 12 by -means of a universally movable joint 42, and

at its lower end each of said suspension elements is connected bymeans of a universally movable joint 43 to the frame 30. The universal joints 42 and 43 may be of any suitable type A;V that is to say they may be the conventionalzball and socket joints illustrated, or

they may be the type of knuckle joint commonly referred to' as 'a universal joint.

Attached to the horizontal supporting member 12 by means of a universally movable 4joint 44.is a downwardly extended rod V45.

Therod 45 is provided with a recess 46 formed longitudinally thereof and extended upi wardly from the lower end of said rod. Connected to the frame 30 by means of a universally movablefjoint 46 is a rod 47, the last mentioned rod being of considerably less diameter than the rod 45 and being extended upwardly into the recess 46 of said rod The lower portion of the rod 45 is screwvthreaded as indicated at 48 and arranged on said screwthreaded portion of said lrod is a nut 49, and interposedbetween said nut and a 'shoulder 49.-"fprovided a part of the universally movable joint 46 is acoil spring 50; The coil spring 50 is. characterized` by a tendency to elongate, hence it `exerts a strong into the hopper portion of the conveyorV housingQO-'and the buckets 2:4 of theendless conveyor 21 (which travelsinthe direction indicated by the arrow in Figure 1) will carry.

sand on the inclined deflector 27 whereby said sand will be directed throughthe conduit 26 and into the enlarged portion 14 Vof the cylindrical housing 13. The rotating screwconveyor 16 within the cylindrical housing will then convey the sand forwardly of said cylindrical housing and whenit reaches the eg;-

treme forward 'end of the cylindrical hous- 1 ing13. the sand will pass through the .portion 15 and sand conductor 37 to theinterior of the barrel of the sand slinger-,iandtherrapidv`ly vrotating sweep 33v` withinfsaid barrel will discharge said sand from theV barrel ofthe sand slinger and direct same forcibly into the flasks.

` As. already stated herein 'the apparatus may be. used in introducing sand into a number offlaslrsV grouped at the base ofthe apf `paratus,or it may be used `inconnectionwith a single larger flash-andjwhen this isso itis necessarytolmovethe sand slingerso as to direct sand into all of the grou of flasks or allparts ofthe `larger flask. n the use of alwaysmove ina horizontal plane, hence the stream -of sand issuingfromV saidsand slinger will be directed-perpendicularly into the flasks. vThe sand conductor 37 is conlnected in placein the apparatusby universally movable jointslocatedatthe opposite ends thereof, hence, said sand conductor will move with'the frame 30 in avmanner to maintain a conduit' fon sand passing to the Y sand slinger regardless 'of the position-of said is so-arranged that it exerts pressureinthe sand slinger.l

The combined Vframe and sand slinger is A quite heavy andit would, therefore, be a severe task for the operator to hold same in a shifted position to which it had been moved. I, therefore, employ the coil spring 50 which direction indicated by the feathered arrow in Figure 1. VDueV to the fact that `thecoil spring when the rod has been moved `out of a `true perpendicular position, exerts downward and outward pressure against the framel30 :which pressure maybe defined Iby horizontal component of said pressure will assist: inmaintaining the frame inany p0si' tion to which it has been adjusted, hence, the

`burden of the `operator in holding the frame Y in positions to which it has beenadj usted is lessened.. The tension of the coil springmay Vbe regulated by -screwingthe nut longitudinally of'thescrewthreaded portion 48jof the rodf'45. Y said sand upwardly and will discharge. said i In Figure 4 I illustrate a modified form fofV .theinvention in accordance with which the Arod VV45, coil spring and associated elements are'eliminated, and insteadthereofl provide each suspension element 41 with a countei`$` `weight 50which -ismounte'd thereon at the upper `endflthereof The counterweights .servethesame lpurpos'e'as the coil spring 50;

thatisrto say,.when the frame 30 is moved said framein such position. j p

, Due to the swivel arrangement'between the Vbase cap 5 and the base plate 1theframe"30 may be swung in a circle about the vertical axes of thesupporting elements V1l whereby `the sandV slinger maybe disposed above flasks grouped in a circle about `the base of the apparatus.v Also whenthe base cap has beenV located in adesired position saine may be'loeked in such position with the aid ofthe my appar-aims theopemton may. grasprjthe f 4.1. Anapparatus of the-class described in y Aframe 30 and moveit in any direction desired due to the l`presenceofthe Vuniversally cluding; a sandslinger, asupport for said sand slinger, ai suspension element, a substan- 1, tlally Vuniversally movable .joint for connecting said suspension element to said support,

and a secondsubstantially universally movable joint which serves to connect said suspensionelement to said sand slinger.. Y

. 2. An apparatus ofthe class described including asand slinger, a support for said sand slinger, a frame bywhich'said sand slingerlis carried, a plurality of ,suspension elements for attaching saidframe to said support, a substantially.:.universally movable joint atoneend of each suspension element forconnectingsame to said support, anda second substantially" universally movable ,joint'at the opposite end of each suspension Velement for COnnectmgsameto saldframe.`

ya vertical and a horizontal component, said 3. An apparatus of the class described in- 4 Y cluding asandslinger, a support forvsaid sand slinger, means j forconveying sand toward said sand slinger, la frame bywhich said sand slinger is carried, `a v.plurality of vsuspension elements for vattaching said frame` to said` l, ysupport, a movable joint lat one end .of each suspensionelement for connecting same to said support, a second movable joint at the opposite end of each suspension element for connecting same to said frame, and a conduit for conducting sand from said sand conveyor to said sand slinger, said conduit comprising a hollow element, a movable joint for connecting said hollow element to said sand conveyor, and a movable joint for connecting said hollow element to said sand slinger.

4;. An apparatus of the class described including a sand slinger, a support for said sand slinger, means for conveying sand toward said sand slinger, a frame by which said sand slingei' is carried, a plurality of suspension elements for attaching said frame to said support, a movable joint at one end of each suspension element for connecting saine to said support, a second movable joint at the opposite end of each suspension element for connecting same to said frame, and a conduit for. conducting sand from said sand conveyor to said sand slinger, said conduit comprising a hollow rigid element, a movable joint for connecting said hollow element to said sand conveyor, and a movable joint for connecting said hollow element to said sand slinger.

5. An apparatus of the class described including a sand slinger, a support for said sand slinger, means for conveying sand -toward said sand slinger, a frame by which said sand slinger is carried, a plurality of suspension elements for attaching said frame to said support, a movable joint at one end of each suspension element for connecting same to said support, a second movable joint at the opposite end of each suspension element for connecting same to said frame, and a conduit for conducting sand from said sand conveyor to said sand slinger, said conduit comprising a hollow rigid element, a movable joint for connecting said hollow element to said sand conveyor,A and a movable joint for connecting said hollow element to said sand slinger, said movable joints associated with said suspension elements and said movable joints associated with said sand conductor being capable of substantial universal movement.

6. An apparatus of the class described including a sand slinger, a support for said sand slinger, a frame by which said sand lslinger is carried, a plurality of suspension for connecting same to said support, a second substantially universally movable joint at the opposite end of each suspension element for connecting same to said frame, and means for maintaining said frame in positions to which it has been adjusted.

7. An apparatus of the class described including a sand slinger, a support for said `opposite end of each suspension element tor connecting saine to said frame, and means including an expansible coil spring for maintaining said frame in positions to which it has been adjusted.

8. An apparatus of the class described including a sand slinger, a support for said sand slinger, a frame by which said sand slinger is carried, a plurality of suspension elements for attaching said frame to said support, a movable joint at one end of each suspension element for connecting same to said support, a second movable joint at the opposite end of each suspension element for connecting same to said frame, and means for helping to maintain said frame in positions to which it has been adjusted, said means including telescoping'members, an expansible coil spring interposed between abutments associated with the respective telescoping members, a movable joint for connecting one of said telescoping members to said support, and a second movable joint for connecting another of said telescoping members-to said frame.

9. An apparatus of the class described including a sand slinger, a support for said sand slinger, a frame by which said sand slinger is carried, a plurality of suspension elements for attaching said frame to said support, a movable joint 'at one end of each suspension element for connecting same to said support, a second movable joint at the opposite end of each suspension element for connecting saine to said frame, and means for helping to maintain said frame in positions to which it has been adjusted, said means including telescoping members, an expansiblc coil spring interposed between abutments associated with the respective telescoping meinbers, a movable joint for connecting one of said telescoping members to said support, and a second movable joint for connecting another of said telescoping members to said frame, said movable joints associated with said suspension elements and said movable joints associated with said telescoping members being capable of substantial universal movement.

In testimony whereof I have hereunto set my hand.

WALTER H. WANGELIN. 

